Configure default supervisord child process logging properly

This commit changes the default supervisord logging configuration as the
following:

* Do not delete child process logfiles on restart
* Redirect stderr to stdout (each of the processes only uses one of
both)
* Give the logfiles readable names
Merge remote-tracking branch 'origin/supervisord-logging-configuration' into develop
Simplify sysv script
genshi balked on some expansions, but they are unneeded anyways